What is 4 over 9 equals x over 108?

Answer 1

4/9 = x/108

Seeing that 9 is a factor of 108, we divide, making 12. 12 times the numerator and the denominator yields:

4(12)/9(12) = x/108

Now we have this. We could multiply both sides by 108, but we already know that everything is now identical, thus:

48/108 = x/108

x = 48.